Inspection method and apparatus, lithographic apparatus, lithographic processing cell and device manufacturing method
AssigneeASML Netherlands B.V.
InventorsHenricus Petrus Maria Pellemans, Arie Jeffrey Den Boef
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Abstract
A device manufacturing method is disclosed. A radiated spot is directed onto a target pattern formed on a substrate. The radiated spot is moved along the target pattern in a series of discrete steps, each discrete step corresponding to respective positions of the radiated spot on the target pattern. Measurement signals are generated that correspond to respective ones of the positions of the radiated spot on the target pattern. A single value is determined that is based on the measurement signals and that is representative of the property of the substrate.
Claims16
A method of measuring a property of a substrate comprising:
- directing a radiated spot onto a target pattern formed on the substrate;
- moving the radiated spot along the target pattern in a series of discrete steps, each discrete step corresponding to respective positions of the radiated spot on the target pattern;
- generating measurement signals that correspond to respective ones of the positions of the radiated spot on the target pattern;
- and
- determining, based on the measurement signals, a single value that is representative of the property of the substrate.
Dependencies are inferred from the claim text.